Refrigeration



Feb. 4, 1936. c. F. HOLSKE- REFRIGERATION File d June" 22, 1954 Patented Feb. 4, 1936 UNITED STATES PATENT OFFICE 2,029,870 REFRIGERATION Clifford F. Holske, Williston Park, N. Y.

Application June 22, 1934, Serial No. 731,955

3 Claims. (Cl. 62-46) My invention relates to and has to do with improvments in refrigeration, especially where ice or other cooling agents are used. .My invention can be used in houses, stores, vehicles such as refrigerator freight cars, automobiles, aeroplanes, dirigibles and the like, and such buildings or vehicles as may require the preservation of foods, liquids, andwhere cool air is required, such as in the rear part of an automobile, pullman car,

berths, aeroplane compartments, etc. It is a refrigerator that is well insulated, having in mind one that is light in weight and one that will be the most eflicient and can be had at a very reasonable cost, and one that is simple in construction and one whose parts can be removed, in-

spected and cleaned and then replaced with dispatch. The aluminum foil or any thin plate or sheet used for the partitions, sides, top and bot- .tom of my invention can be delivered to builders of equipment in rolls and cut off .to desired lengths and applied where desired and inasmuch as many layers as may be desired can be used,

consequently providing cheaply a multiplicity of air spaces as insulation about the ice and cooling or storage compartments and can be. used to insulate against cold or heat from the outside, or

, vice versa, and is an insulator against noise such as may be desired in the walls of radio broadcasting studios, railroad passenger cars and the like.

There have been many types of refrigerators built heretofore, but to my knowledge I know of none such as I wish to claim herewith.

The following drawing and description will serve to explain exactly what I wish to claim in :5 Letters Patent.

Referring to the figures in the drawing,

Fig. 1 is a perspective view of my invention on a small scale showing in broken lines air inlet and outlet pipes employed when the device is 40 used for cooling air.

Fig. 2 is a cross section of my invention on a larger scale taken on line W and W of Fig. 1 and shows the ice and food chambers; also the circulation of air through passages from the food 45 compartmentto the ice and the like and also compartment door M, an air inlet a, and an air outlet a2 in dotted lines. In Fig. 2 I show the refrigerator cut in two so as to show the insulation, the thin aluminum foil insulation sheets 3 and the rubber or paper separating strips 3a 5 placed on the top or ice chamber, rigid insulating partitions 4, and sloped bottom sheets 4a, bottom floor sheet of insulation 4?), a drip'sheet 5 and a drain pipe in leading out of the box at 5b, and placed in the top or ice chamber 6 are 10 a pair of metal grids l and I that slope toward the center and rest above and on the supporting members 4a and 4a. Placed on the grids 1 and I there is shown a cake of ice 8 and in dotted lines a cake of ice 8a that has been melted down but 15 continues to center on the grids I.

When the refrigerator is employed for storing food, a cake of ice is placed in the ice compartment 6 on grids I, the food being placed in the lower compartment la, the circulation of air be- 20 ing shown by the arrows in Figure 2.

If used for cooling the air, omit. if. desired. the food and open up the air intake a and the ou A let a2.

My refrigerator comprises respectively, an up- 26 per and lower chamber 6 and la. The upper compartment contains the cooling means 8, the lower compartment being the cooled space. A rack or grid between the two compartments provides suitable means for supporting the ice or 80 other refrigerant. Drain pans 4a below the grid slope sharply toward the middle of the refrigerator to accelerate the flow of air and water. the flow of air being indicated by the arrows in Figure 2. The inner edges of these pans are spaced from each other to allow the passage of cooled air down into the lower compartment. The drip sheet 5 is positioned below this space to receive the drip water, air flues or spaces being provided at the sides of the upper compartment to allow 40 the passage ofair from the cooled space into the top of the cooling compartment.

In this way heat leakage through the upper portion is retarded due to the maintaining of a higher temperature difference across the insulation and the heat so received is passed over the ice and not mixed with the circulating air until it has been cooled. The major circulation cycle in the refrigerator is up the sides,under ice and down the center. The secondary cycle which normally handles the heat received in the upper in the normal cycle.

I provide in arefrigerator a heat conducting plate or plates having thermal contact with the cooling means (as when welded to the ice supporting grids) placed in the cold air (path of cooled air) in order to continue the cooling of the air or other fluid after it has left the ice or other usual cooling surface in order to continue the cooling beyond the point now possible and thus attain a lower air temperature.

Also, a cooling method is provided in which ice or other cooling agent is supported on a metal frame, plate or rack adapted to allow the flow of air below said rack. Heat conducting members are connected to said frame, plate or rack extending down to and connecting with a lower plate located below the ice supporting rack and substantially parallel to it. Cooled air in its circulation downward, is thus cooled further by contact with this lower plate and a lower temperature is obtained in the lower compartment for constant refrigeratingmedium temperature than can be obtained by methods now used.

What I claim is:

1. In a refrigerator construction, a plurality of drip pans extending inwardly from the side walls of the refrigerator body, said drip pans having their adjacent inner edges spaced fromeach other, refrigerant supporting racks supported by said drip pans, and extensions projecting from said refrigerant supporting racks, said extensions lysaid drip pans, in spaced relation therewith, each of said refrigerant supporting racks having a portion disposed in the space between the inner edges of the drip pans and in spaced relation thereto, means thermally connected to each of said refrigerant supporting racks for maintaining them in spaced relation to their respective drip pan, and a drip sheet mounted beneath the drip pans and bridging the space between the inner edges thereof.

3. In a refrigerator, a refrigerant compartment, a refrigerant support within said compartment, said refrigerant support including a plurality of closely spaced parallel elements arranged to form an air passage beneath and in contact with the lower surface of a refrigerant supported thereon, and side bailles above the support and providing vertical air passages extending substantially at a uniform width to the support, said side baifles and one of said supporting elements being fixed, and said first mentioned air passage having communication with said last mentioned air passages for conveying part of the air around the refrigerant and out of contact therewith to the-upper surface thereof and also for conveying part of the air along the lower surface of the refrigerant without rising to a point above said lower surface.

CLIFFORD F. HOLSKE. 

